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Servers and applications

CVE-2016-8738

In Apache Struts 2.5 through 2.5.5, if an application allows entering a URL in a form field and the built-in URLValidator is used, it is possible to prepare a special URL which will be used to overload server process when performing validation of the URL.

Severity
Medium 5.9
Published
20 Sept 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
3.3% in the next 30 daysHigher than 88% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · Only under certain conditions · No login needed · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
Apache StrutsServers and applications · cpe:a:apache:struts
  • Version 2.5
  • Version 2.5.1
  • Version 2.5.2
  • Version 2.5.3
  • Version 2.5.4
  • Version 2.5.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-8738
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-8738